Vocab. 1
What is Newton's First Law of Motion?
An object at rest will remain at rest and an object in motion will remain in motion, unless acted on by an unbalanced force.
What is Mass?
The amount of material/matter in an object.
To find the net force when forces are pushing or pulling in the SAME direction, what do you do?
Add the two forces together.
What is the formula for speed?
S = D/T
(Speed = Distance/Time)
Which of the following describes an application of Newton’s law of inertia?
[A] A car stops suddenly, but the passengers in the car are thrust forward into the seat belts.
[B] The force pushing downward on a box is equal to the force pushing upward on the box.
[C] Earth’s tectonic plates collide with equal force and equal acceleration.
A car stops suddenly, but the passengers in the car are thrust forward into the seat belts.
What is Newton's Second Law of Motion?
Acceleration is produced when a force acts on a mass.
What are balanced forces?
Equal forces acting in opposite directions causing no change in motion.
To find the net force when forces are pushing or pulling in the OPPOSITE direction, what do you do?
Subtract the forces.
What is the formula for force?
F=MxA
(Force=Mass x Acceleration)
A 70 kg adult and a 35 kg child face each other on ice skates. According to Newton’s laws of motion, what will happen if the two skaters push against each other?
[A] The adult will move backward, but the child will not move.
[B] The adult will not move, but the child will move backward.
[C] They will both move backward at the same speed.
[D] They will both move backward, but the child will move at a faster speed.
They will both move backward, but the child will move at a faster speed.
What is Newton's Third Law of Motion?
For every action, there is an equal and opposite reaction.
What are Unbalanced Forces?
Forces not equal in size that cause the motion or direction of an object to change.
What is the net force on the square and in what direction will it go?
<- 15N Left [] 10N Right ->
5N Left
What is the formula for acceleration?
A=(Vf-Vi)/T
(Acceleration = Final Velocity-Initial Velocity/Time)
A rising hot air balloon is acted on by a force pulling it upward and by the force of gravity pulling it downward. According to Newton’s law of inertia, what will happen to the balloon when the force of gravity equals the upward force?
Its motion will be constant.
What is Inertia?
The tendency of an object to resist any change in motion.
What is Net Force?
The sum of all forces acing on an object.
What is the net force on the square and in what direction will it go?
<- 25N Left [] <- 20N Left
45N Left
How fast is a monkey running if it takes him (or her) 30 minutes to travel 240 meters?
8 meters per minute
According to Newton’s third law of motion, if someone jumps off a skateboard, the skateboard will roll backward because–
for the force that sent the person forward, there is an equal force pushing back on the skateboard.
What is Acceleration?
The rate that an object changes velocity.
What is Friction?
A force that opposes the motion of objects that touch as they move past each other.
What is the net force on the square and in what direction will it go?
2,340,095N Right -> [] <- 2,390,291N Left
50,196N Left
A plane from Waco to Dallas travels 85 miles in 25 minutes. What is the speed?
3.4 miles per minute
Do you love science??
YES!